#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {
  int a = 10;
  int b = 20;
  printf("a>b:%d\n", a > b);
  printf("a<b:%d\n", a < b);

  int m3 = 10;
  if (m3 > 1 && m3 < 5) {
    printf("北京");
  } else {
    printf("南京");
  }
  return EXIT_SUCCESS;
}
